Fact Check: Does Ranked-Choice Voting Actually Reduce Political Polarization?

In an era defined by intense political polarization and voter dissatisfaction with binary choices, ranked-choice voting has emerged as the most widely discussed democratic reform in the United States. Proponents argue it is a structural antidote to vitriol, capable of transforming how campaigns are run and who ultimately wins. Critics often dismiss these promises as utopian, warning that the system is overly complex and fails to deliver on its grandest claims. To separate the rhetoric from reality, we examined the empirical data from dozens of municipalities and states that have already made the switch.[6]

The mechanics of ranked-choice voting are straightforward in theory: instead of selecting a single candidate, voters rank their preferences. If no candidate secures an outright majority of first-choice votes, an instant runoff is triggered. The candidate with the fewest votes is eliminated, and their supporters' votes are redistributed to their second choices. This process repeats until one candidate crosses the fifty-percent threshold. The central premise is that this mechanism fundamentally alters the incentives for politicians seeking office.[1][3]

The first major claim evaluated by election researchers is that ranked-choice voting reduces negative campaigning. The logic suggests that because candidates need to appeal to their rivals' supporters for second-choice votes, they will avoid launching vicious attack ads that might alienate those voters. According to comprehensive data from the Bipartisan Policy Center, this claim is supported by strong evidence. In mayoral races utilizing the system, researchers documented a measurable decrease in negative messaging compared to traditional plurality elections.[2]

Candidates in these races frequently engage in cross-endorsements, publicly asking voters to rank them first and a specific rival second. This structural need to build coalitions rather than simply energize a base fundamentally changes the tone of the final weeks of a campaign. The National Bureau of Economic Research found that this shift is not just anecdotal; the reduction in hostility is statistically significant across multiple election cycles in diverse geographic regions.[2][4]

The second major claim is that the system penalizes extreme candidates and rewards consensus builders. Under traditional plurality rules, a highly polarizing figure with a dedicated base of thirty percent can win a crowded primary if the moderate vote is fractured among several candidates. Ranked-choice voting is designed to prevent this exact scenario by ensuring the winner has broad, if not always enthusiastic, support across the electorate.[1][6]

The evidence for this claim is robust. Data compiled by the MIT Election Data and Science Lab shows that candidates who are broadly acceptable to a majority of voters consistently defeat polarizing candidates who have high first-choice support but deep unfavorability ratings. The system effectively approximates the election of a Condorcet winner—a candidate who would defeat every other candidate in a series of head-to-head matchups.[1][4]

However, not all claims made by advocates hold up to empirical scrutiny. The third major assertion—that ranked-choice voting significantly increases voter turnout—is supported by only weak and mixed evidence. While advocacy groups like FairVote often point to high-turnout elections in areas that recently adopted the system, academic researchers caution against confusing correlation with causation.[1][3]

The MIT Election Lab notes that voter turnout is driven far more by the competitiveness of the specific race, the amount of money spent, and the broader political climate than by the format of the ballot itself. While the system does not appear to depress turnout, the data does not support the idea that changing the ballot structure alone will suddenly draw large numbers of disengaged citizens to the polls.[1]

Another critical area of study is voter comprehension. Opponents frequently argue that ranking candidates is too confusing for the average voter, potentially leading to spoiled ballots and disenfranchisement. To test this, the Pew Research Center conducted extensive post-election polling in jurisdictions that recently transitioned to the new system.[5]

The polling data reveals a highly encouraging picture: despite initial apprehension, the vast majority of voters find the system intuitive once they are actually in the voting booth. Over sixty percent of voters reported that the ranking process was easy to understand, and ballot spoilage rates were statistically indistinguishable from traditional elections after the first implementation cycle.[5]

A genuine vulnerability in the system, however, is the phenomenon of ballot exhaustion. This occurs when a voter chooses to rank only one or two candidates, and those candidates are eliminated in early rounds. If the voter has not ranked any of the finalists, their ballot becomes inactive and does not factor into the final round of tabulation.[2][6]

The Bipartisan Policy Center found that ballot exhaustion rates can range from five to fifteen percent in highly fractured races. While this means some voters do not weigh in on the final pairing, researchers note that this is conceptually similar to a voter choosing to stay home during a traditional runoff election because their preferred candidate was eliminated in the primary.[2]

Ultimately, the empirical evidence paints a nuanced but highly positive picture of ranked-choice voting. It is not a magic bullet capable of curing all democratic apathy, nor does it guarantee high turnout. It does, however, deliver on its most important structural promises: it demonstrably curbs the vitriol of modern campaigns and ensures that elected officials represent a genuine consensus of their constituents.[4][6]

As more municipalities consider adopting the reform, the data suggests that the transition requires robust voter education campaigns to minimize early confusion. But once established, the system provides a proven mechanism for cooling the political temperature and rewarding candidates who seek to unite rather than divide.[1][6]